If you feel that your Cisco Unity Connection mailbox fills up more quickly than you expect, the reasons listed below may explain why. (Your Connection administrator specifies the size of your mailbox.)
Message retention policy may not be enforced
By default, Connection does not automatically delete messages once they reach a certain age. This means that unless your Connection administrator set up the system to enforce a message-retention policy, you are responsible for managing the size of your mailbox by periodically reviewing your saved messages and either moving, archiving, or deleting them permanently.
If Connection is set up to enforce a message-retention policy, ask your Connection administrator how long the system stores your messages before permanently deleting them. You can then plan to archive or move important messages ahead of time. Connection does not indicate when a message-retention policy is enforced, nor does it warn you before message are permanently deleted as a result of such a policy.
Deleted items and nondelivery receipts are included in total mailbox size
Messages in the Deleted Items folder in the Messaging Inbox web tool are included in the total mailbox size. In addition, when you receive nondelivery receipts (NDRs) for messages that you send, your mailbox can quickly increase in size—especially when original messages included large attachments.
Total message size includes original when messages are forwarded
You may receive messages that have been forwarded many times over, which increases message size. The original message plus all recorded introductions that were added during forwarding equal the total message size. As a result, your mailbox can exceed its limit, even though you may have relatively few messages stored in it.
Total message size includes attachments
You may receive messages that contain attached files such as spreadsheets, documents, faxes, and pictures. The message plus all attached files equal the total message size. As a result, your mailbox can exceed its limit, even though you may have relatively few messages stored in it.